Spark-arrester an



(No Model.)

W. M. LETTS.-

SPARK AR-RESTER AND DRAFT REGULATOR. No. 475,579. Patented May 24, 1892.

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WALTER M. LETTS, or SEDALIA, MISSOURI.

SPARK-ARRESTE R ANZD DRAFT-REGU LATOR.

SPECIFICATION forming part of Letteis Patent No. 475,579, dated May 24,1892.

Application filed September 10, 1891. Serial No. 405,280. (No model.) i

To all: whom it may concern:

Missouri, have invented a new and Improved: Spark-Arrester andDraft-Regulator, of which i the following is a full, clear, and exactdescription.

My invention relates to improvements in draft-regulating andspark-arresting attachments for locomotives; and the object of myinvention is to produce a device by means of which the locomotive-may begiven any necessary amount of draft, and also to construct and arrangethese attachments in such a way that the sparks and cinders will beretained in the smoke-box of the locomotive.

To this end my invention consists in certain features of constructionand combinations of parts, which will be hereinafter described andclaimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a broken vertical section of a locomotive-boiler andsmoke-box provided with my attachments. Fig. 2 is a broken sectionalplan of the same on the line 2 2 in Fig. 1, and Fig. 3 is averticalcross-section on the line 3 3 in Fig. 1.

The boiler-shell 10 is prolonged beyond the fines in the usual way andhas at its front end the smoke-box 11, from the top of which the smokepasses out through the stack 12 in the usual way. Bolted or otherwisesecured to the shell near the top and in front of the smoke-stack is apartition 13, which fits airtight in the upper portion of the shell and.which extends downward into the smoke-box and is curved rearward at itslower end, so that the lower portion of the partition will be in anearly horizontal position, as shown at This horizontal portion of thepartition fits snugly around the steam'nozzle 15, which is arrangedbeneath the smoke-stack and connects with the exhaust and directsteam-pipes, as shown in dotted lines at 16, in the usual manner, andthis nozzle projects a little above the horizontal portion of thepartition. That part of the partition 13 which is in front of thesmoke-stack should be far enough forward so that if necessary a com- Beit known that I, WVALTER M. LETTS, off Sedalia, in the county of Pettisand State oft mon form of petticoat-pipe may be placed above the nozzle.The horizontalportion 14E of the partition 13 also fits snugly aroundthe branches 18 of the steam-pipe 17, which pipe projects forward intothe smoke-box and con nects with the branch pipes by means of a T 19.The branch pipes project forward and downward and connect with thecylinders in the usual way.

The vertical portions of the branch pipes 18 and the nozzle 15 are madeof a substantially triangular shape, with edges toward the fines, asbest shown at 20 in Fig. 2, and this construction prevents the cindersfrom striking the pipes and being forced backward against the fines. Alittle above the fines in the boiler is a transverse angle-iron 21,which is secured to the flue-sheet 22, and a deflectorplate 23 issecured to the angle-iron and to the sides of the boiler-shell, saiddeflectorplate extending forward and a little downward into thesmoke-box, and a damper-plate 24. is secured to the front portion of thede flector-plate 23, and in order that the damperplate may be adjustedthe plate 23 is provided with slots 25, through which extend bolts .26,by means of which the damper-plate is clamped to the deflector-plate,and it will be seen that the damper-plate may be pushed back and forthupon the deflector-plate and held in any desired position.

The side edges of the damper-plate may be secured to angle-irons andadapted to, slide in the same manner. The front edge of the damper-plateis preferably arranged so as to be a little below the rear edge of thehorizontal portion 14 of the partition 13, and the draft from the fluesand smoke-box is up through the opening between the damperplate andpartition and out through the smokestack. Secured to the bottom portionof the boiler-shell at the foot of the flue-sheet 22 is a shield 27,which extends forward into the smoke-box and is upwardly inclined, saidshield being fitted snugly around the nozzle 15 and the branch pipes 18,and this shield prevents the cinders from falling back in front of thefiues and interfering with the draft.

Any sized nozzle may be used in connection with the apparatus, and itwill be underto the partition, substantially as described.

stood thatthe attachments may be secured to any common form oflocomotive. By letting the steam into the nozzle 15 it rushes up throughthe smoke-stack, thus creating a strong draft, and the arrangement ofthe deflector-plate and the partition prevents the sparks and cindersfrom being carried up through the stack, and they will be deposited inthe front end of the smokeebox.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1.

1. The combination, with the smoke-box of, a locomotive having asteam-draft nozzle therein, of an imperforate partition arranged in theupper portion of the smoke-box and embracing the nozzle, and a deflectorsecured to the flue-sheet of the boiler-and extending forward above thefines to a point adjacent? 2. The combination, with the smoke-box of alocomotive, of a rearwardly curved and imperforate partition secured tothe upper portion of the smoke-box in front of the stack, a steam draftnozzle extending upwardly through the partition, and an adjustabledeflector-plate secured to the flue-sheet of the boiler and extendingforward into the smokebox, substantially: as described. l

3. The combination, with the smoke-box of a locomotive havingdeflector-plates in its up it per portion beneath the stack, of thesteampipes and exhaust-nozzle arranged within the box, said pipes andexhaust-nozzle being of angular cross -seotion, substantially asdescribed.

WALTER M. LETTS. Witnesses:

W. J. LETTS,

T. L. LICKLIDER.

